Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?

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#Question id: 11534

#Unit 6. System Physiology – Plant

Which of the following is the precursor of auxin?

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#Question id: 15843

#Unit 8. Inheritance Biology

You have isolated two temperature-sensitive mutations in phage l that you suspect may be in the same gene. These phage mutants are called ts-1 and ts-2. Each mutant will form plaques at 35˚C but not at 42˚C. You cross ts-1 to ts-2 phage by coinfecting E. coli at the permissive temperature of 35˚C. When the resulting phage lysate is plated at 35˚C you count 10,000 plaques per ml of phage lysate, but when the same phage lysate is plated at 42˚C, there are only 80 plaques per ml.           What is the distance between the ts-1 and ts-2 mutations in m.u.?

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#Question id: 2695

#Unit 2. Cellular Organization

Which of the following palindromes is not a restriction site?

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#Question id: 23847

#Unit 2. Cellular Organization

Which group of external signals regulated by Smooth muscle cells and non-muscle cells?

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#Question id: 19332

#Unit 12. Applied Biology

Which one of the following transducers is a self-generating type transducer?